Merrill generic name is Ibuprofen Suspension, after taking the drug has been cooled down and then recurring, should be targeted according to the cause of the fever. The most common causes include viral infections, bacterial infections, and treatments include: antiviral and antibacterial treatments. Using only fever-reducing medications without treating the original cause of the illness may result in a recurrence of the fever after it has been lowered. After taking ibuprofen, the fever has been lowered and then recurred, it is considered that the patient’s body has a persistent inflammatory stimulation caused by the most common causes are viral and bacterial infections, so we need to go to the hospital to do blood tests to clarify whether there is a viral or bacterial infection at present. In addition, we can also do lung CT and urine routine examination to clarify whether there is respiratory tract infection, or improve the relevant examination to clarify whether there is the possibility of urinary tract infection. The patient should be treated with antibacterial drugs such as amoxicillin or cephalosporin antibiotics or antiviral drugs such as oseltamivir and ribavirin as soon as possible. In addition, if fever reappears, antipyretic drugs should be given to reduce fever, and if necessary, physical hypothermia can be given to control the patient’s body temperature as soon as possible. The above drugs should be used under the guidance of a doctor.